A well-built solar system needs little maintenance, but little is not none. In Bangladesh's dry season, dust alone can cut output by 5 to 8% within a few weeks.
Cleaning
Rinse panels with clean water and a soft brush early in the morning, before the glass heats up. Never use detergent, pressure washers or abrasive pads.
| Season | Cleaning interval |
|---|---|
| November to March (dry) | Every 2 weeks |
| April to May | Every 3 weeks |
| June to October (monsoon) | Monthly, or after dust storms |
Monthly checks
- Look at the monitoring app for strings producing less than their neighbours
- Check inverters for error codes and blocked fans
- Look for bird nests, loose cables and cracked glass
Tip: A string that produces 10% less than others on the same inverter is a sign of a loose connector or a damaged panel. Call your installer.
Annual service
Once a year, have an engineer carry out a thermal scan, torque check of all electrical connections, insulation tests and an earthing check. Our O&M plans cover all of this.
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